Simple bug/vulnerability exploit:
When you have a character with the green "level up" option press the "party management button" as soon as you press the "party management button" you can quickly hit the [L] or [R] buttons (on top of the PSP) to toggle to a character without level up and you will notice that the option to "man level up" or "Automatic level up" will appear as an option for the character you toggled to. (I have been successful toggling three characters away so you should with practice be able to level the entire party.) Note to get all six you need to have a floater low level guy with level up option to give to the charecter you used for your other five toons.
Additionally, I would suggest level as max 19 go through the game with three characters; a rouge, a sorcerer, and a cleric. You will be able to beat the game much faster without the boredom of six characters to mover around a dungeon in explorer mode. Also note you need to exit out of party management each time you level to repeat this option. I would suggest going no higher than 19 as it gives you another two levels to advance any higher and you could crash your game.
(supplied by: Netsonar)
